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Cache foldability more intelligently

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Signed-off-by: Nathan Sobo <nathan@github.com>
This commit is contained in:
Max Brunsfeld
2017-12-05 17:01:49 -08:00
committed by Nathan Sobo
parent f3715779e5
commit 77fd29647a
1 changed files with 11 additions and 2 deletions
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13
src/tree-sitter-language-mode.js
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@@ -26,7 +26,10 @@ class TreeSitterLanguageMode {
}
bufferDidChange ({oldRange, newRange, oldText, newText}) {
this.isFoldableCache.length = 0
const startRow = oldRange.start.row
const oldEndRow = oldRange.end.row
const newEndRow = newRange.end.row
this.isFoldableCache.splice(startRow, oldEndRow - startRow, ...new Array(newEndRow - startRow))
this.document.edit({
startIndex: this.buffer.characterIndexForPosition(oldRange.start),
lengthRemoved: oldText.length,
@@ -44,7 +47,13 @@ class TreeSitterLanguageMode {
buildHighlightIterator () {
const invalidatedRanges = this.document.parse()
for (let i = 0, n = invalidatedRanges.length; i < n; i++) {
this.emitter.emit('did-change-highlighting', invalidatedRanges[i])
const range = invalidatedRanges[i]
const startRow = range.start.row
const endRow = range.end.row
for (let row = startRow; row < endRow; row++) {
this.isFoldableCache[row] = undefined
}
this.emitter.emit('did-change-highlighting', range)
}
return new TreeSitterHighlightIterator(this)
}